Points - optical device consisting of two lenses or glasses to protect the eyes, mounted in a frame. Frame is necessary for the correct position of the lens (glass) with respect to the eye. Using the handles are fixed points behind the ears. Sometimes, instead of handles or straps are used tape. Manufacture glass lenses, people learned in ancient times. So in Crete in the ruins of the palace of Knossos was discovered lens, carved from rock crystal. Scientists suggest that this finding dates back to 1200-1500 years BC. However, glasses, according to most scholars, invented only in the XIII century. Venice is considered the birthplace of points. In the Middle Ages, their action is associated with some mysterious, magical powers. In Russia, presumably, there were points in the second half of the XVII century. Currently distinguish corrections (correcting the lack of vision) and protective (protecting against aggressive environment) glasses. Among the goggles in the first place are the sun. Now they not only perform its basic function (to protect your eyes from bright light), but also are fashionable attribute of summer clothes.
Glasses
Points - optical device consisting of two lenses or glasses to protect the eyes, mounted in a frame. Frame is necessary for the correct position of the lens (glass) with respect to the eye. Using the handles are fixed points behind the ears. Sometimes, instead of handles or straps are used tape. Manufacture glass lenses, people learned in ancient times. So Much ...